118438258 has 32 divisors (see below), whose sum is σ = 189221760. Its totient is φ = 55520640.

The previous prime is 118438253. The next prime is 118438273. The reversal of 118438258 is 852834811.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 118438258.

It is not an unprimeable number, because it can be changed into a prime (118438253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312313 + ... + 312691.

It is an arithmetic number, because the mean of its divisors is an integer number (5913180).

Almost surely, 2^118438258 is an apocalyptic number.

118438258 is a deficient number, since it is larger than the sum of its proper divisors (70783502).

118438258 is a wasteful number, since it uses less digits than its factorization.

118438258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562.

The product of its digits is 61440, while the sum is 40.

The square root of 118438258 is about 10882.9342550619. The cubic root of 118438258 is about 491.0932939255.

The spelling of 118438258 in words is "one hundred eighteen million, four hundred thirty-eight thousand, two hundred fifty-eight".